Tools / Note reading games / Alto clef
In the alto clef, middle C is the middle line. The lines are F A C E G and the spaces G B D F. It's the viola's clef. Check the chart, then name notes in the game. Free, no signup.
The alto clef is a C clef. The two curves of the clef meet in a point, and whatever line that point sits on is middle C. In the alto clef it points at the middle (third) line, so the staff is centred on middle C, reaching from F3 on the bottom line to G4 on the top line. That's why it suits instruments whose range sits around middle C.
| Bottom to top | Notes | Memory aid | |
|---|---|---|---|
| Lines | F A C E G | F3 A3 C4 E4 G4 | FACE, then G (or Fat Alley Cats Eat Garbage) |
| Spaces | G B D F | G3 B3 D4 F4 | Good Boys Do Fine |
Alto clef has no single standard mnemonic the way treble does, so borrow what you know: the lines start with FACE (the treble clef spaces) and the spaces are the first four bass clef lines. Just outside the staff are E3 below and A4 above.
If you already read treble clef, there's a shortcut you can use as a check: each alto clef position is one letter higher than the same position in treble clef, an octave lower. The treble bottom line is E4; the alto bottom line is F3. Use it to confirm, not as your main method: the goal is to see the note directly.
Level 1 of the game drills the five notes around middle C (A3 to E4), so you build the habit of reading out from the clef's centre. After that come lines, spaces, the whole staff, ledger lines (down to B2, past the open C string, and up to D5) and accidentals.
The viola is the main one: viola music is written in alto clef, switching to treble clef for long high passages. The alto clef is also used for alto trombone, and you'll meet it in older vocal and choral editions, where alto parts were traditionally written with a C clef. Because the clef is centred on middle C, a viola's range fits on the staff with few ledger lines; in treble clef the lower notes would need several below, and in bass clef the upper notes several above.
Cellists, bassoonists and trombonists read a different C clef, the tenor clef, where middle C is the fourth line. Practising both helps keep them apart: the hub's mixed-clef game shuffles treble, bass, alto and tenor.
A few minutes a day works better than one long session (see spaced repetition for musicians). Go for accuracy first; speed follows. Say the note name out loud before you tap, and when a level feels easy, mix it up: interleaved practice is harder in the moment but sticks better.
The five lines from bottom to top are F, A, C, E and G (F3 to G4), with middle C on the middle line. The four spaces are G, B, D and F (G3 to F4). E3 sits just below the staff and A4 just above it.
On the middle (third) line. The alto clef is a C clef, and the point where its two curves meet marks middle C.
Mainly the viola, which reads alto clef and switches to treble clef for high passages. It is also used for alto trombone and appears in older vocal and choral editions for alto parts.
Each alto clef position is one letter higher than the same position in treble clef, sounding an octave lower: the bottom line is F3 instead of E4. Use that as a check, but aim to read alto clef directly from its landmarks, starting with middle C on the middle line.
The viola's range sits around middle C. Centring the staff on middle C keeps most viola notes on the staff; in treble clef the low notes would need several ledger lines, and in bass clef the high ones would.
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Reading notes is half of it. Fifths is an ear-training app that trains the other half: hearing which note is higher, how far apart two notes are, and how each note sits in the key, with practice that adapts to what you miss.
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